resignation of the cia director germ david petraeus, stepping down because of an extramarital affair. here's part of the message he sent to employees this afternoon. after being married for over 37 years, i showed extremely poor judgment by engaging in an extramarital affair. such behavior is unacceptable, both as a husband and as the leader of an organization such as ours. this afternoon, the president graciously accepted my resignation. let's get right to our cnn intelligence correspondent suzanne kelly. pretty shocking information from all we know. what else are you learning? >> right. well, wolf, i don't think i can emphasize what a bombshell this was yesterday. in the letter that was sent to employees at the cia, this is the first they were hearing about what's obviously been going on for a while. and of course while we can't ask general pa traeurs what's going on, there are a few more nuggets that he sent out to the workforce today. he quoted teddy roosevelt when he said one of life's greatest gifts is the opportunity to work hard at work worth doing. these are petraeus's own words.